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From: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
To: Mimi Zohar <zohar@linux.ibm.com>,
	James Bottomley <James.Bottomley@HansenPartnership.com>,
	linux-integrity@vger.kernel.org
Subject: Re: ima_tpm_chip is queried and saved only at IMA init, but never later
Date: Thu, 3 Oct 2019 17:39:03 -0700	[thread overview]
Message-ID: <570885b3-c595-7381-3c03-91282d82351e@linux.microsoft.com> (raw)
In-Reply-To: <1570117759.5046.4.camel@linux.ibm.com>

On 10/3/19 8:49 AM, Mimi Zohar wrote:
>> Can IMA take a dependency on TPM and postpone IMA initialization until a
>> TPM device shows up?
> 
> IMA is already on the late_initcall(), waiting for the TPM
> initialization to complete.  

> How would you define a TPM dependency?
I meant - can IMA return a status code from it's init routine such that 
it gets called back when a TPM device shows up. And, at that point 
continue the initialization.

Similar to how a driver for Device A would indicate it's dependency on 
the availability of a Device B. I am not sure if such a thing is 
possible with IMA.

Thanks,
  -lakshmi


  reply	other threads:[~2019-10-04  0:39 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-24 22:31 Lakshmi Ramasubramanian
2019-09-24 22:37 ` James Bottomley
2019-10-03 15:40   ` Lakshmi Ramasubramanian
2019-10-03 15:49     ` Mimi Zohar
2019-10-04  0:39       ` Lakshmi Ramasubramanian [this message]
2019-10-03 15:58     ` James Bottomley

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